Abstract:
A multi-layer printed circuit board including a first insulating layer, a first conductor layer having conductor circuits on one surface of the first insulating layer, a second conductor layer having conductor circuits on the opposite surface of the first insulating layer, a second insulating layer on the second conductor and first insulating layers, and a third conductor layer having conductor circuits on the second insulating layer on the opposite side of the second conductor layer. The first and second insulating layers have first and second via holes which are formed in openings of the first and second insulating layers and made of conductive materials filled to the top of the openings such that conductor circuits in the first and third conductor layers are connected to one or more conductor circuits in the second conductor layer, and the first and second via holes are tapering toward the second conductor layer.
Abstract:
A multilayer printed circuit board according to the present invention is a multilayer printed circuit board where a plurality of insulating layers, a conductor circuit and an optical circuit are formed and layered and an optical element is mounted, wherein the above described optical circuit is formed between the above described insulating layers.
Abstract:
A printed circuit board includes a chip capacitor having electrodes and a metal film formed on one or more of the electrodes, an accommodating layer accommodating the chip capacitor inside the accommodating layer, a connection layer formed over the accommodating layer and having a via hole opening extending to the metal film, and a first via hole structure formed in the via hole opening of the connection layer and connected to the metal film on the one or more of the electrodes of the chip capacitor.
Abstract:
A method of manufacturing a multi-layer printed circuit board includes the following steps (A) and (B). (A) Providing penetrating openings which are formed into through holes and each of which has a small diameter for a core substrate, and (B) providing penetrating openings which are formed into through holes each having a large diameter for the core substrate.
Abstract:
The present invention has for its object to provide a multilayer printed circuit board which is very satisfactory in facture toughness, dielectric constant, adhesion and processability, among other characteristics. The present invention is directed to a multilayer printed circuit board comprising a substrate board, a resin insulating layer formed on said board and a conductor circuit constructed on said resin insulating layer, wherein said resin insulating layer comprises a polyolefin resin.
Abstract:
Chip capacitors are provided in a printed circuit board. In this manner, the distance between an IC chip and each chip capacitor is shortened, and the loop inductance is reduced. In addition, the chip capacitors are accommodated in a core substrate having a large thickness. Therefore, the thickness of the printed circuit board does not become large.
Abstract:
The present invention is to provide a multilayered printed circuit board free from cracks attributed to thermal expansion difference between a solder resist layer and another part and a multilayered printed circuit board of the present invention comprises a conductor circuit and a resin insulating layer serially formed on a substrate in an alternate fashion and in repetition and a solder resist layer formed as an outermost layer, and the solder resist layer contains an inorganic filler.
Abstract:
A printed circuit board has a core substrate including a resin substrate having an opening, a capacitor formed in the opening and having a first electrode structure having a portion facing to the upper surface of the core substrate and a second electrode structure having a portion facing to the lower surface of the core substrate, an upper insulating layer formed over the upper surface of the core substrate and having a conductive circuit formed over the upper insulating layer and a via hole electrically connecting the portion of the first electrode structure and the conductive circuit of the upper insulating layer, and a lower insulating layer formed over the lower surface of the core substrate and having a conductive circuit formed over the lower insulating layer and a via hole electrically connecting the portion of the second electrode structure and the conductive circuit of the lower insulating layer.
Abstract:
A device for optical communication includes an organic optical waveguide having a core part and a cladding part. The core part and the cladding part comprise a polymer material, and the cladding part includes particles.
Abstract:
A printed circuit board includes a core substrate having an opening portion, an electronic component provided in the opening portion of the core substrate and including a dielectric body, a first electrode formed over the dielectric body, and a second electrode formed over the dielectric body such that the dielectric body is interposed between the first electrode and the second electrode, and a resin filling a gap between the core substrate and the electronic component in the opening portion of the core substrate. The resin filling the gap includes a filler.